For fuel injector of 300kw diesel generator with long time use, if we want to check whether it is normal, can test it spray test on test-bed. If it is found that the follows situations, we need to disassemble and inspect: Opening pressure of fuel injection is lower than the specified value and the fuel is not atomized. No obvious cutting or oil dripping. Nozzle blockage. The spray of oil mist from four spray holes is uneven, with different lengths. Serious carbon deposit at the head of fuel injector. How to disassemble fuel injector of 300kw diesel generator ? Firstly, loosen the pressure regulating nut and screw out the pressure regulating screw. Secondly, clamp the fuel injector upside down in the vise to loosen the fuel injector tightening cap. Then, disassemble other parts and clean it by clean diesel oil. The carbon deposit at the nozzle head can be removed with a copper wire brush. If the needle valve is bite, clamp the end of the needle valve with the wire ...